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Changing 82 fuel pump for 85

Z

zgator

Guest
Please anybody that has done this tell me how hard it is to do and is it worth it.Is it too much pressure for the stock FI units?Or if somebody is better than me doing a search please post a link.Thanks
 

Twin_Turbo

Well-known member
Joined
Jan 11, 2001
Messages
618
Location
Enschede, The Netherlands
Corvette
1982 Twin Turbocharged Red/Black
if you can cut and reconnect 2 wires you can do it. It's THAT simple.

These pumps create flow, not pressure. Pressure is the result of flow through a restricion. This restriction is a spring loaded diaphragm called a fuel pressure regulator and the spring pressure determines if the diaphragm opens and allows excess volume to purge to the return line (and thus lowering pressure), in short, you can bolt any flow pump to it and the regulator will regulate the pressure to the desired setting (well, if the fuel flow is so large that the regulator or return line becomes restrictive then pressure will rise above reg setting but you will never achieve that much fuel flow)
 

cinci5

Well-known member
Joined
Jul 24, 2005
Messages
71
Location
Hamburg, N.Y.
Corvette
1982 Red w/red leather int.
Conversion

Please anybody that has done this tell me how hard it is to do and is it worth it.Is it too much pressure for the stock FI units?Or if somebody is better than me doing a search please post a link.Thanks

http://www.crossfire.homeip.net/cftest/article.asp?TOPIC_ID=479&FORUM_ID=18&CAT_ID=1
Try this link I did it from this and all is well !
it helps out stock pressure, change out fuel filter as well. mine went from a weak 8 1/2 to a solid 10 after the pump change then manually changed the psi up to 14psi that was the hard part. Had to make my own flexible tool to reach the bottom of the pressure regulator.
 

jdp6000

Well-known member
Joined
Aug 23, 2004
Messages
646
Location
Aurora, Ontario, Canada
Corvette
1982 CROSSFIRE
http://www.crossfire.homeip.net/cftest/article.asp?TOPIC_ID=479&FORUM_ID=18&CAT_ID=1
Try this link I did it from this and all is well !
it helps out stock pressure, change out fuel filter as well. mine went from a weak 8 1/2 to a solid 10 after the pump change then manually changed the psi up to 14psi that was the hard part. Had to make my own flexible tool to reach the bottom of the pressure regulator.

Did you find a difference when you jacked it up to 14 psi?

Jim
 

cinci5

Well-known member
Joined
Jul 24, 2005
Messages
71
Location
Hamburg, N.Y.
Corvette
1982 Red w/red leather int.
It did help, it seemed to smooth out the idle and give it more torque. It was worth it I feel.
 
P

Phill's Vette

Guest
http://www.crossfire.homeip.net/cftest/article.asp?TOPIC_ID=479&FORUM_ID=18&CAT_ID=1
Try this link I did it from this and all is well !
it helps out stock pressure, change out fuel filter as well. mine went from a weak 8 1/2 to a solid 10 after the pump change then manually changed the psi up to 14psi that was the hard part. Had to make my own flexible tool to reach the bottom of the pressure regulator.

This site sells a special tool just for the CFI TB fuel pressure adjustment and it works better than anything I have seen; they have a lot of other Crossfire stuff also. http://crossfireinjection.net/
 

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